// Copyright (c) 2010 SuccessFactors, Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
//     * Redistributions of source code must retain the above
//       copyright notice, this list of conditions and the following
//       disclaimer.
//
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials
//       provided with the distribution.
//
//     * Neither the name of the SuccessFactors, Inc. nor the names of
//       its contributors may be used to endorse or promote products
//       derived from this software without specific prior written
//       permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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// OF THE POSSIBILITY OF SUCH DAMAGE.

package org.owasp.jxt;

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.Set;

/**
 * ReflectNode
 *
 * @author Jeffrey Ichnowski
 * @version $Revision: 8 $
 */
public abstract class ReflectNode extends JxtNode {

    private Set<String> _setAttributes = new HashSet<String>();

    protected ReflectNode(String tagName) {
        super(tagName);
    }

    @Override
    public final void setAttribute(ValidationContext ctx, String name, String value) {
        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(getClass());
            for (PropertyDescriptor prop : beanInfo.getPropertyDescriptors()) {
                if (!name.equals(prop.getName())) {
                    continue;
                }

                Method writeMethod = prop.getWriteMethod();
                if (writeMethod == null) {
                    continue;
                }

                Attribute attr = writeMethod.getAnnotation(Attribute.class);
                if (attr == null) {
                    continue;
                }

                if (writeMethod.getParameterTypes()[0] == JxtExpr.class) {
                    writeMethod.invoke(this, toExpr(ctx, value));
                } else {
                    if (attr.pattern().length() != 0 && !value.matches(attr.pattern())) {
                        throw new IllegalArgumentException(
                            "validation.attribute-invalid");
                    }
                    writeMethod.invoke(this, value);
                }

                _setAttributes.add(name);

                return;
            }

            throw new IllegalArgumentException(
                Messages.format("validation.attribute-unknown", name));

        } catch (IntrospectionException e) {
            throw new UnsupportedOperationException(e);
        } catch (IllegalAccessException e) {
            throw new UnsupportedOperationException(e);
        } catch (InvocationTargetException e) {
            throw new UnsupportedOperationException(e);
        }
    }

    @Override
    protected final void validateSelf(ValidationContext ctx) {
        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(getClass());
            for (PropertyDescriptor prop : beanInfo.getPropertyDescriptors()) {
                Method writeMethod = prop.getWriteMethod();
                if (writeMethod == null) {
                    continue;
                }

                Attribute attr = writeMethod.getAnnotation(Attribute.class);
                if (attr == null) {
                    continue;
                }

                String name = prop.getName();

                if (attr.required() && !_setAttributes.contains(name)) {
                    ctx.error(this, "validation.attribute-required", name);
                }
            }
        } catch (IntrospectionException e) {
            throw new UnsupportedOperationException(
                "IntrospectionException", e);
        }
    }

    protected void validateContent(ValidationContext ctx) {
    }

} // ReflectNode
